Door lock



p 1950 T. w. LARSON 2,522,878

noon LOCK Filed Jan. 28, 1947 III] III! 33 INVEN TOR.

Ifieadora fianson Patented Sept. 19, 1950 UNITED. STATES PATENT OFFICE 1 a 1' 7 DOOR LOCK Theodore W. Larson, Hayward, Wis.

Application January 28, 1947, Serial No. 724,855

1 Claim. 1 1 This invention relates to door locks, and more particularly to door locks of the sliding bolt type.

A main object of the invention is to provide a novel and improved door lock device which is very simple in construction, easy to install and positive in operation.

A further object of the invention is to provide an improved door lock structure which may be mounted on either the right or left side of a door and may be locked either from the inside or the outside of the door, said structure involving only a few simple parts and being very inexpensive to manufacture.

Further objects and advantages of the invention will become apparent from the following description and claim, and from the accompanying drawings, wherein:

Figure 1 is a front elevational view of a door lock structure according to the present invention, shown mounted at the left side of a door, said View being taken on line of Figure 2.

Figure 2 is a vertical cross-sectional view taken on line 2-2 of Figure 1.

Figure 3 is a horizontal cross-sectional taken on line 33 of Figure 2.

Figure 4 is an enlarged detail view of a locking pin member employed with the door lock structure of Figure 1.

Figure 5 is a horizontal cross-sectional view showing a modified door lock structure according to this invention.

Referring to the drawings, designates the left side portion of a door, and I2 designates the portion of the door frame adjacent thereto. Secured to door I is a housing I4 one side of which is closed by rectangular plate I3 and the open side of which is covered by a removable face plate 5. Face plate |5 carries at each end an outwardly projecting aperture lug as indicated at I6 and I1. Longitudinally slidable in housing 4 is a lock bolt l8 to which is secured a headed pin member I9 projecting outwardly through a longitudinal slot 20 formed in face plate I5. Plate I3 is extended beyond one side of the housing and provided with an aperture therethrough.

Secured to the opposite side of the door is a bearing plate 2| having an aperture therethrough. Extending rotatably through the door and journalled respectively in the aperture in bearing plate 2| and the aperture in the housing extension provided by the upper portion of plate I3 is a horizontal shaft member 22. The opposite end portions of shaft member 22 carry the respective depending handle members 23 and 24, rigidly secured to said shaft end portions. A depending view arm 26 is mounted on the shaft and is rigidly secured thereto by nuts 21, 21. A coiled spring 28 encircles shaft 22 and biases arm 26 against face plate l5.

Arm 26 is formed with an elongated slot 23 through which headed pin member 9 slidably passes, whereby bolt I8 may be longitudinally shifted by rotating either handle 23 or 24. Mounted on frame member I2 in registry with housing I4 is a U-shaped staple or keeper 30 adapted to receive bolt l8 when said bolt is shifted to locking position. In this position a locking pin member 3| may be passed behind the rear end of bolt l8 through registering apertures formed respectively in face plate I 5, plate member l3, door I and an angle bracket 32 secured to the opposite side of the door. Angle bracket 32 is formed with an apertured lug 33 similar to lug l1 and pin member 3| is provided with an offset eye portion 34 adapted to register with the aperture in projection 33 when the pin is in looking position, whereby the staple of a padlock may be engaged with the registering members.

Pin member 3| may be engaged in looking position from the opposite side of door II from that shown in Figure 3, whereby eye portion 34 may be made to register with apertured projection l1 and a padlock engaged with the registering members.

Where the lock structure is mounted on the right side of a door instead of the left side, hearing plate 32 is positioned adjacent the left side of the lock structure instead of the right side, with lug 33 reversed from the position shown in Figure 3, whereby offset eye portion 34 of the locking pin may register with lug 33 for securement by a padlock. When the pin member is inserted from the opposite side of the door, lug 33 may be placed in registry with projection I6 for engagement with the padlock.

The lock structure can be mounted on either the inside or the outside of a door.

Figure 5 discloses a modification of the invention wherein the lock structure is mounted on the inside of a door 4|] and wherein a recess 36 is provided in the door frame 4| to receive the sliding bolt, said recess having a mortise plate 3'1 through which the bolt passes when it is shifted to locking position. An apertured angle bracket having portions 32 and 33 is secured to the door on the side thereof opposite the housing for cooperation with a locking pin 3| to lock the bolt in extended position in recess 36, and for securing the look by a padlock.

While a specific embodiment of a lock structure has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention other than as defined by the scope of the appended claim.

What is claimed is:

A door lock comprising a rectangular housing having a closed side and an open side attachable to a door with its closed side against one side of the door, a removable face plate closing the open side of said housing and having an elongated slot therein, a, lock bolt longitudinally slidable in said housing and projectible from one end of the latter to locking position, a pin secured to said lock bolt and extending through the slot in said face plate, an apertured extension on said housing, an apertured bearing plate attachable to the door at the side of the latter opposite said housing with its aperture in alignment with the aperture in said housing extension, a shaft journalled in said'bearing plate and said housing extension,

said face plate and in operative association with said pin.

THEODORE W. LARSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,510,562 Segal Oct. '7, 1924 20 1,551,102 Hathaway Aug. 25, 1925 1,786,521 Dermody Dec. '30, 1930 2,198,079 Ferris et a1. Apr. 23, 1940 

